Sheffield came across several Yankees' officials at the Tampa
Bay Buccaneers' game against the New York Giants on Monday night.
His agent, Rufus Williams, said it was an informal conversation.
Sheffield is talking with several teams, Williams said.
"It's still in the preliminary phase," Williams said Tuesday.
"I'm happy with the way everything is progressing."
Among the Yankees officials at the meetings were team president
Randy Levine, chief operating officer Lonn Trost, general manager
Brian Cashman and assistant general manager Jean Afterman.